com.cedarsoftware.util.io.JsonReader requires a public constructor with no arguments (otherwise it'll try to find another constructor and call it with default values, e.g. null may change to 0)

source/net/filebot/vfs/SimpleFileInfo.java

@@ -7,8 +7,12 @@ import java.util.Arrays;
 
 public class SimpleFileInfo implements FileInfo, Comparable<FileInfo> {
 
-	private final String path;
+	private String path;
-	private final long length;
+	private long length;
+
+	public SimpleFileInfo() {
+		// used by deserializer
+	}
 
 	public SimpleFileInfo(String path, long length) {
 		this.path = path;

source/net/filebot/web/AudioTrack.java

@@ -20,7 +20,8 @@ public class AudioTrack implements Serializable {
 
 	protected String mbid; // MusicBrainz Identifier
 
-	protected AudioTrack() {
+	public AudioTrack() {
+		// used by deserializer
 	}
 
 	public AudioTrack(AudioTrack other) {

source/net/filebot/web/Episode.java

@@ -26,8 +26,8 @@ public class Episode implements Serializable {
 	// extended series metadata
 	protected SeriesInfo seriesInfo;
 
-	protected Episode() {
+	public Episode() {
-
+		// used by deserializer
 	}
 
 	public Episode(Episode obj) {
@@ -45,8 +45,8 @@ public class Episode implements Serializable {
 		this.title = title;
 		this.absolute = absolute;
 		this.special = special;
-		this.airdate = (airdate == null ? null : airdate.clone());
+		this.airdate = airdate == null ? null : airdate.clone();
-		this.seriesInfo = (seriesInfo == null ? null : seriesInfo.clone());
+		this.seriesInfo = seriesInfo == null ? null : seriesInfo.clone();
 	}
 
 	public String getSeriesName() {

source/net/filebot/web/Movie.java

@@ -14,8 +14,8 @@ public class Movie extends SearchResult {
 	// optional movie name language hint
 	protected String language;
 
-	protected Movie() {
+	public Movie() {
-		// used by serializer
+		// used by deserializer
 	}
 
 	public Movie(int imdbId) {

source/net/filebot/web/MoviePart.java

@@ -5,8 +5,8 @@ public class MoviePart extends Movie {
 	protected int partIndex;
 	protected int partCount;
 
-	protected MoviePart() {
+	public MoviePart() {
-		// used by serializer
+		// used by deserializer
 	}
 
 	public MoviePart(MoviePart obj) {

source/net/filebot/web/MultiEpisode.java

@@ -11,8 +11,8 @@ public class MultiEpisode extends Episode {
 
 	protected Episode[] episodes;
 
-	protected MultiEpisode() {
+	public MultiEpisode() {
-		// used by serializer
+		// used by deserializer
 	}
 
 	public MultiEpisode(Episode... episodes) {

source/net/filebot/web/SubtitleSearchResult.java

@@ -23,6 +23,10 @@ public class SubtitleSearchResult extends Movie {
 	private Kind kind;
 	private int score;
 
+	public SubtitleSearchResult() {
+		// used by deserializer
+	}
+
 	public SubtitleSearchResult(int imdbId, String name, int year, String kind, int score) {
 		this(name, null, year, imdbId, -1, Locale.ENGLISH, Kind.forName(kind), score);
 	}